US3052708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of aromatic sulfones
Assignee: Sanofi Aventis France
•
Filing: 1959-04-16
•
Granted: 1962-09-04
•
Expires: 1979-04-16
Abstract
No abstract record available.
Inventors
- 👤 Velluz Leon
- 👤 Joly Robert
- 👤 Bucourt Robert
- 👤 Fabignon Colette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:53
CPC Classifications
C; C07; C07C; C07C315/00; C07C303/00; C07C303/24; C07C315/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS OF PRODUCING AROMATIC SULFONES HAVING THE FORMULA R-SO2-R'', WHEREIN R AND R'' REPRESENT CARBOCYCLIC AROMATIC RADICALS HAVING A BENZENE NUCLEUS, WHICH COMPRISES CONTACTING ABOUT EQUIMOLECULAR AMOUNTS OF (1) A CARBOCYCLIC AROMATIC COMPOUND, R''-H, HAVING A BENZENE NUCLEUS AND CONTAINING A REPLACEABLE HYDROGEN ATOM ATTACHED THERETO, WITH (2) A SULFATE SELECTED FROM THE GROUP CONSISTING OF (1) SULFONATE-SULFATE MIXED ANHYDRIDES HAVING THE FORMULA R-SO2-O-SO2-O-R", WHEREIN R HAS THE MEANING GIVEN ABOVE AND R" REPRESENTS A LOWER ALKYL RADICALS, AND (2) HALOPYROSULFATES HAVING THE FORMULA X-SO2-O-SO2-O-R", WHEREIN X REPRESENTS CHLORINE AND R" REPRESENTS A LOWER ALKYL RADICAL, AT TEMPERTURES BETWEEN ABOUT ROOM TEMPERATURE AND 120*C. FOR A TIME SUFFICIENT TO EFFECT THE REACTION, AND RECOVERING SAID AROMATIC SULFONE FROM THE REACTION MASS.
Claim 2
Dependent Claim
122 words
A PROCESS OF PRODUCING AROMATIC SULFONES HAVING THE FORMULA R-SO2-R'', WHEREIN R AND R'' REPRESENT CARBOCYCLIC AROMATIC RADICALS HAVING A BENZENE NUCLEUS, WHICH COMPRISES CONTACTING ABOUT EQUIMOLECULAR AMOUNTS OF (1) A CARBOCYCLIC AROMATIC COMPOUND, R''-H, HAVING A BENZENE NUCLEUS AND CONTAINING A REPLACEABLE HYDROGEN ATOM ATTACHED THERETO, WITH (2) A SULFATE SELECTED FROM THE GROUP CONSISTING OF (1) SULFONATE-SULFATE MIXED ANHYDRIDES HAVING THE FORMULA R-SO2-O-SO2-O-R", WHEREIN R HAS THE MEANING GIVEN ABOVE AND R" REPRESENTS A LOWER ALKYL RADICALS, AND (2) HALOPYROSULFATES HAVING THE FORMULA X-SO2-O-SO2-O-R", WHEREIN X REPRESENTS CHLORINE AND R" REPRESENTS A LOWER ALKYL RADICAL, AT TEMPERTURES BETWEEN ABOUT ROOM TEMPERATURE AND 120*C. FOR A TIME SUFFICIENT TO EFFECT THE REACTION, AND RECOVERING SAID AROMATIC SULFONE FROM THE REACTION MASS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |